I was using the Anderson Tall man composit shaft, with the control pod mounted with the headphones pointed down, so that they would not be yanked off my ears when I dropped to my knees to pick up a target when ground hunting.
This increased the probability of the battery cable being flexed/pulled as this cable is exposed at the top of the shaft.
You have to be especially careful when cleaning the protective coil cover, aka skid plate , on a shaft this long as
it is very difficult to do without stressing the battery cable and the cable that goes the search coil by pushing theese exposed cables into the ground.
After having to send the metal detector back for a second repair, I now mount the contol pod so that the head phones are at the
top of the shaft pointing up and now only use the protective bottom cover on the coil (aka skid plate) when hunting over sharp objects stick up above the sand.
IIRC, you recommended not using the skid plate, on dry and wet sand as the protective bottom cover was intended for hunting on land. Unfortunately, I did not follow this recommendation, which was excellent advice, as you wear a harness which gives you better coil control.
I have really enjoyed detecting with the Excalibur ll since I stopped using the protective bottom cover, as I no longer have to clean the coil, every one to two hours. Ironically the only damage, that was done to the search coil, which has a soft membrane on the bottom, was when a large course grain of sand got between the cover and the search coil, creating a large dimple in the bottom of the search coil which is very noticable.
I hate to think of all the deep targets, I did not detect, because of noise created by sand between the skid pad and the bottom of the search coil. As the degradation in performance is gradual, it is not noticable, until you realize that you are no longer able to distinguish between targets and noise.
Gala Clad were you using extended shaft, waist mount or chest mounting the controls?